The generative cell of male angiosperm gametophytes is haploid. This cell divides to produce two haploid sperm cells. What type of cell division does the generative cell undergo to produce these sperm cells?
A) mitosis
B) meiosis
C) mitosis without subsequent cytokinesis
D) meiosis without subsequent cytokinesis
A
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WHO has targeted for elimination of
A. polio. B. dracunculiasis. C. measles. D. plague. E. polio, dracunculiasis, AND measles.
As long as our sample is large enough it will be the case that the average outcome for the untreated group should have what distribution?
A. The same as the underlying population distribution B. Normal C. Skewed distribution D. T-distribution
What is the advantage of being a C4 or CAM plant? In what environments would these types of plants have a selective advantage, and why?
What will be an ideal response?
You are a paleontologist trying to find fossils that represent intermediate forms in an evolutionary transition. Which of the following pieces of information could help you identify a geological formation for your search?
a. Based on the fossil record the evolutionary transition must have taken place 210 to 230 million years ago. b. Transitional fossils likely had long spines. c. The organisms' hard shells would have made fossilization likely. d. The transition is predicted to have taken place in shallow inland seas. e. A and D.